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/*
* linux/arch/mips/tx4938/common/handler.S
*
* Primary interrupt handler for tx4938 based systems
* Copyright (C) 2000-2001 Toshiba Corporation
*
* 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
* terms of the GNU General Public License version 2. This program is
* licensed "as is" without any warranty of any kind, whether express
* or implied.
*
* Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/tx4938/rbtx4938.h>
.align 5
NESTED(tx4938_irq_handler, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
mfc0 t0, CP0_CAUSE
mfc0 t1, CP0_STATUS
and t0, t1
andi t1, t0, STATUSF_IP7 /* cpu timer */
bnez t1, ll_ip7
/* IP6..IP3 multiplexed -- do not use */
andi t1, t0, STATUSF_IP2 /* tx4938 pic */
bnez t1, ll_ip2
andi t1, t0, STATUSF_IP1 /* user line 1 */
bnez t1, ll_ip1
andi t1, t0, STATUSF_IP0 /* user line 0 */
bnez t1, ll_ip0
.set reorder
nop
END(tx4938_irq_handler)
.align 5
ll_ip7:
li a0, TX4938_IRQ_CPU_TIMER
move a1, sp
jal do_IRQ
j ret_from_irq
ll_ip2:
jal tx4938_irq_nested
nop
beqz v0, goto_spurious_interrupt
nop
move a0, v0
move a1, sp
jal do_IRQ
j ret_from_irq
goto_spurious_interrupt:
j ret_from_irq
ll_ip1:
li a0, TX4938_IRQ_USER1
move a1, sp
jal do_IRQ
j ret_from_irq
ll_ip0:
li a0, TX4938_IRQ_USER0
move a1, sp
jal do_IRQ
j ret_from_irq
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